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Long-Term Impact of Liming on Soil C and N in a Fertile Spruce Forest Ecosystem

Persson, Tryggve and Andersson, Stefan and Bergholm, J. and Grönqvist, Tomas and Högbom, Lars and Vegerfors-Persson, Birgitta and Wirén, A. (2021). Long-Term Impact of Liming on Soil C and N in a Fertile Spruce Forest Ecosystem. Ecosystems. 24 , 968-987
[Research article]

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Abstract

Liming can counteract acidification in forest soils, but the effects on soil C and N pools and fluxes over long periods are less well understood. Replicated plots in an acidic and N-rich 40-year-old Norway spruce (Picea abies) forest in SW Sweden (Hasslov) were treated with 0, 3.45 and 8.75 Mg ha(-1)of dolomitic lime (D0, D2 and D3) in 1984. Between 1984 and 2016, soil organic C to 30 cm depth increased by 28 Mg ha(-1)(30% increase) in D0 and decreased by 9 Mg ha(-1)(9.4% decrease) in D3. The change in D2 was not significant (+ 2 Mg ha(-1)). Soil N pools changed proportionally to those in soil C pools. The C and N changes occurred almost exclusively in the top organic layer. Non-burrowing earthworms responded positively to liming and stimulated heterotrophic respiration in this layer in both D2 and D3. Burrowing earthworms in D3 further accelerated C and N turnover and loss of soil. The high soil C and N loss at our relatively N-rich site differs from studies of N-poor sites showing no C and N loss. Earthworms need both high pH and N-rich food to reach high abundance and biomass. This can explain why liming of N-rich soils often results in decreasing C and N pools, whereas liming of N-poor soils with few earthworms will not show any change in soil C and N. Extractable nitrate N was always higher in D3 than in D2 and D0. After 6 years (1990), potential nitrification was much higher in D3 (197 kg N ha(-1)) than in D0 (36 kg N ha(-1)), but this difference decreased during the following years, when also the unlimed organic layers showed high nitrification potential. Our experiment finds that high-dose liming of acidic N-rich forest soils produces an initial pulse of soil heterotrophic respiration and increases in earthworm biomass, which together cause long-term declines in soil C and N pools.

Authors/Creators:Persson, Tryggve and Andersson, Stefan and Bergholm, J. and Grönqvist, Tomas and Högbom, Lars and Vegerfors-Persson, Birgitta and Wirén, A.
Title:Long-Term Impact of Liming on Soil C and N in a Fertile Spruce Forest Ecosystem
Series Name/Journal:Ecosystems
Year of publishing :2021
Volume:24
Page range:968-987
Number of Pages:20
Publisher:SPRINGER
ISSN:1432-9840
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Decomposition, Heterotrophic respiration, pH, Net N mineralization, Nitrification, Nitrifiers, Earthworms
URN:NBN:urn:nbn:se:slu:epsilon-p-108184
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-108184
Additional ID:
Type of IDID
DOI10.1007/s10021-020-00563-y
Web of Science (WoS)000573419400001
ID Code:24781
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
VH - Faculty of Veterinary Medicine and Animal Science
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology

(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment

(VH) > Dept. of Animal Nutrition and Management
(S) > Dept. of Forest Ecology and Management
(NL, NJ) > Dept. of Energy and Technology
Deposited By: SLUpub Connector
Deposited On:02 Jul 2021 08:25
Metadata Last Modified:02 Jul 2021 08:31

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